linux-kernel - Re: [PATCH] memory: omap-gpmc: fixup wrongly hierarchy of the sub-devices

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Date: Fri, 1 Mar 2024 13:22:12 +0200
From: Roger Quadros <rogerq@...nel.org>
To: "Brock.Zheng" <yzheng@...hyauld.com>, Tony Lindgren <tony@...mide.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] memory: omap-gpmc: fixup wrongly hierarchy of the
 sub-devices

Hi,

Thanks for the patch but can you please re-send the patch in plain text format?
Please refer to this article for more details.

https://subspace.kernel.org/etiquette.html

On 01/03/2024 01:52, Brock.Zheng wrote:
> On TI-AM335x，my FPGA under GPMC local-bus can not work on 6.x kernel.
> 
> GPMC <--> FPGA  <--> sub-devices....
> 
> I found that the platform sub-devices is in wrongly organized
> hierarchy.  The grandchildren are now under the GPMC device
> directly, not under it's father(FPGA).> 
> Signed-off-by: Brock.Zheng <yzheng@...hyauld.com>
> ---
>  drivers/memory/omap-gpmc.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
> index 80d038884207..1f2568e43086 100644
> --- a/drivers/memory/omap-gpmc.c
> +++ b/drivers/memory/omap-gpmc.c
> @@ -2175,6 +2175,7 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
> 	int ret, cs;
> 	u32 val;
> 	struct gpmc_device *gpmc = platform_get_drvdata(pdev);
> +	struct platform_device *child_pdev = NULL;
>  
> 	if (of_property_read_u32(child, "reg", &cs) < 0) {
> 		dev_err(&pdev->dev, "%pOF has no 'reg' property\n",
> @@ -2330,11 +2331,12 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
>  no_timings:
>  
> 	/* create platform device, NULL on error or when disabled */
> -	if (!of_platform_device_create(child, NULL, &pdev->dev))
> +	child_pdev = of_platform_device_create(child, NULL, &pdev->dev);
> +	if (!child_pdev)
> 		goto err_child_fail;
>  
> 	/* create children and other common bus children */
> -	if (of_platform_default_populate(child, NULL, &pdev->dev))
> +	if (of_platform_default_populate(child, NULL, &child_pdev->dev))
> 		goto err_child_fail;
>  
> 	return 0;

-- 
cheers,
-roger